mt48lc2m32b2 Micron Semiconductor Products, mt48lc2m32b2 Datasheet - Page 59

• Manufacturer Part Number: mt48lc2m32b2
• Description: Synchronous Dram
• Manufacturer: Micron Semiconductor Products

Figure 41:
PDF: 09005aef811ce1fe/Source: 09005aef811ce1d5
64MSDRAMx32_2.fm - Rev. J 12/08 EN
COMMAND
BA0, BA1
DQM 0-3
A0-A9
CLK
CKE
A10
DQ
t CMS
t CKS
t AS
t AS
t AS
Alternating Bank Read Accesses
ACTIVE
BANK 0
T0
ROW
ROW
t CKH
t CMH
t AH
t AH
t AH
Notes:
t RCD - BANK 0
t RAS - BANK 0
t
t
RC - BANK 0
RRD
t CK
T1
NOP
1. For this example, BL = 4 and CL = 2.
2. A8 and A9 = “Don’t Care.”
ENABLE AUTO PRECHARGE
t CMS
t CL
COLUMN m 2
BANK 0
T2
READ
t CMH
t CH
CAS Latency - BANK 0
T3
NOP
t LZ
t AC
59
BANK 4
ACTIVE
T4
ROW
ROW
D
OUT
t OH
t AC
m
t RCD - BANK 4
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D
T5
OUT
NOP
m + 1
t OH
t AC
ENABLE AUTO PRECHARGE
COLUMN b 2
BANK 4
D
T6
READ
OUT
m + 2
t OH
t AC
CAS Latency - BANK 4
t RP - BANK 0
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D
T7
OUT
NOP
64Mb: x32 SDRAM
m + 3
t OH
Timing Diagrams
t AC
BANK 0
T8
ROW
ACTIVE
ROW
DON’T CARE
UNDEFINED
D
OUT
t RCD - BANK 0
t OH
t AC
b